Freeze Warning
* WHAT...Lows between 19 and 25 degrees are expected Tuesday night
into Wednesday morning.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
and Denver.
* WHEN...From 10 PM this evening to 10 AM MDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...Some areas within these zones have already
experienced a killing freeze, particularly Weld County, Longmont
and vicinity, and the northeast Denver metro. However, many of the
more urban locations remain susceptible, and are expected to see a
killing freeze Tuesday night.
From: Oct 28, 2025 15:52
Until: Oct 29, 2025 16:00
Freeze Warning
* WHAT...For the first Freeze Warning, sub-freezing temperatures as
low as 26 expected. For the second Freeze Warning, sub-freezing
temperatures as low as 19 expected.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
Denver, and Castle Rock.
* WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT
Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM
MDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
From: Oct 28, 2025 02:51
Until: Oct 28, 2025 18:00
Freeze Warning
* WHAT...Low temperature Tuesday morning will be between 24 and 32
degrees. On Wednesday morning, lows will be between 18 and 26
degrees.
* WHERE...Fort Collins, Boulder and the western suburbs of Denver,
Denver, and Castle Rock.
* WHEN...For the first Freeze Warning, from 2 AM to 10 AM MDT
Tuesday. For the second Freeze Warning, from 10 PM Tuesday to 10 AM
MDT Wednesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
From: Oct 27, 2025 18:27
Until: Oct 28, 2025 12:00
Special Weather Statement
At 607 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Kiowa, or 32 miles west of Limon, moving east at
25 mph.
HAZARD...Wind gusts up to 50 mph and half inch size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Simla and Matheson.
From: Oct 28, 2025 00:07
Until: Oct 28, 2025 00:45
Fire Weather Watch
* AFFECTED AREA...Fire Weather Zones 216, 239, 240, 241, 245,
246, 247 and 249.
* TIMING...From Monday morning through Monday afternoon.
* WINDS...Northwest 20 to 35 mph with gusts up to 50 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 19, 2025 10:39
Until: Oct 19, 2025 21:00
Frost Advisory
* WHAT...Temperatures between 32 and 36 degrees will result in frost
formation.
* WHERE...The Denver metro, Boulder and Longmont.
* WHEN...From 10 PM Saturday to 8 AM MDT Sunday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered. Patchy freezing
temperatures will also be possible for the coldest locations,
namely in and around Longmont and the suburbs north of Denver.
From: Oct 17, 2025 19:34
Until: Oct 19, 2025 14:00
Freeze Warning
* WHAT...Sub-freezing temperatures in the 26 to 32 degree range
expected.
* WHERE...Most of east central, north central, and northeast
Colorado.
* WHEN...Until 8 AM MDT this morning.
* IMPACTS...Freezing temperatures could kill crops and other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
From: Oct 19, 2025 09:55
Until: Oct 19, 2025 14:00
Frost Advisory
* WHAT...Temperatures in the 32 to 36 degree range will result in
frost formation.
* WHERE...Boulder and the western suburbs of Denver, and Denver.
* WHEN...Until 8 AM MDT this morning.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
From: Oct 19, 2025 09:55
Until: Oct 19, 2025 14:00
Freeze Warning
* WHAT...Sub-freezing temperatures in the 26 to 32 degree range
expected.
* WHERE...Most of east central, north central, and northeast
Colorado.
* WHEN...From 10 PM this evening to 8 AM MDT Sunday.
* IMPACTS...Freezing temperatures could kill crops and other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
From: Oct 18, 2025 08:06
Until: Oct 18, 2025 22:15
Frost Advisory
* WHAT...Temperatures in the 32 to 36 degree range will result in
frost formation.
* WHERE...Boulder and Denver metro areas.
* WHEN...From 10 PM this evening to 8 AM MDT Sunday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered. Patchy freezing
temperatures will also be possible for the coldest locations,
namely in and around Longmont and the suburbs north of Denver.
From: Oct 18, 2025 08:06
Until: Oct 18, 2025 22:15
Fire Weather Watch
* AFFECTED AREA...Fire Weather Zones 216, 239, 241, 246 and 247.
* TIMING...Sunday afternoon.
* WINDS...Southwest 10 to 15 mph with gusts to 25 to 30 mph.
* RELATIVE HUMIDITY...10 to 15 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 18, 2025 08:11
Until: Oct 18, 2025 22:00
Freeze Watch
* WHAT...Sub-freezing temperatures between 25 and 32 degrees
expected.
* WHERE...Portions of east central, north central, and northeast
Colorado.
* WHEN...From Saturday evening through Sunday morning.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
From: Oct 17, 2025 19:34
Until: Oct 18, 2025 12:00
Fire Weather Watch
The National Weather Service in Denver has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect
Sunday afternoon.
* AFFECTED AREA...Fire Weather Zones 216, 239, 241, 246 and 247.
* TIMING...Sunday afternoon.
* WINDS...Southwest 10 to 15 mph with gusts 25 to 30 mph.
* RELATIVE HUMIDITY...10 to 15%.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Oct 17, 2025 19:39
Until: Oct 18, 2025 12:00
Winter Weather Advisory
* WHAT...Wet snow expected. Total snow accumulations 3 to 8 inches
on high mountain passes, with locally a foot or more on highest
peaks along the Front Range, and little or no snow accumulation in
mountain valleys including the towns of Silverthorne and Winter
Park.
* WHERE...Rocky Mountain National Park and the Medicine Bow Range,
and The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks.
* WHEN...From midnight tonight to 6 PM MDT Tuesday.
* IMPACTS...Plan on slippery and slushy road conditions over the
high mountain passes. The hazardous conditions will impact the
Tuesday morning and evening commutes.
From: Sep 22, 2025 20:13
Until: Sep 23, 2025 12:00
Special Weather Statement
At 1213 AM MDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Florence, or 35 miles west of Pueblo, moving
southeast at 20 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Florence, Canon City, and Wetmore.
From: Sep 18, 2025 06:13
Until: Sep 18, 2025 07:00
Air Quality Alert
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Air Quality Health Advisory for Wildfire Smoke.
WHERE...Moffat, Routt, Grand, Jackson, Summit, Gilpin and Clear
Creek Counties. Locations include, but are not limited to Craig,
Steamboat Springs, Granby, Hot Sulphur Springs, Kremmling, Walden,
Breckenridge, Central City and Georgetown.
WHEN...900 AM Saturday September 06 to 900 AM Sunday September 07
IMPACTS...Smoke transported from out-of-state wildfires will
produce areas of moderate to heavy smoke across the advisory area
on Saturday and Sunday.
HEALTH INFORMATION...Public Health Recommendations: If smoke is
thick or becomes thick in your neighborhood you may want to remain
indoors. This is especially true for those with heart disease,
respiratory illnesses, the very young, and older adults. Consider
limiting outdoor activity when moderate to heavy smoke is present.
Consider relocating temporarily if smoke is present indoors and is
making you ill. If visibility is less than 5 miles in smoke in
your neighborhood, smoke has reached levels that are unhealthy.
From: Sep 06, 2025 15:10
Until: Sep 07, 2025 15:00
Air Quality Alert
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Action Day for Particulates.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Thursday September 04 to 400 PM Friday September 05
IMPACTS...Action Day for Particulates is now in effect for the
Front Range Urban Corridor. Elevated levels of fine particulate
matter will remain in the Front Range on Friday due to lingering
smoke. Ozone Levels are expected to remain in the Good to Moderate
range. For Colorado air quality conditions, forecasts, and
advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce pollution by limiting driving gas
and diesel-powered vehicles until at least 4 PM Friday, September
5, 2025.
HEALTH INFORMATION...If smoke is thick or becomes thick in your
neighborhood you may want to remain indoors. This is especially
true for those with heart disease, respiratory illnesses, the very
young, and older adults. Consider limiting outdoor activity when
moderate to heavy smoke is present. Consider relocating
temporarily if smoke is present indoors and is making you ill. If
visibility is less than 5 miles in smoke in your neighborhood,
smoke has reached levels that are unhealthy.
From: Sep 05, 2025 21:10
Until: Sep 06, 2025 15:00
Air Quality Alert
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Action Day for Multiple Pollutants.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Thursday September 04 to 400 PM Friday September 05
IMPACTS...Action Day for Multiple Pollutants is now in effect for
the Front Range Urban Corridor. Hot, dry weather combined with
out-of-state wildfire smoke will allow ozone and fine particulate
concentrations to reach the Unhealthy for Sensitive Groups
category at times both Thursday and Friday. For Colorado air
quality conditions, forecasts, and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce pollution by limiting driving gas
and diesel-powered vehicles until at least 4 PM Friday, September
5, 2025.
HEALTH INFORMATION...If smoke is thick or becomes thick in your
neighborhood you may want to remain indoors. This is especially
true for those with heart disease, respiratory illnesses, the very
young, and older adults. Consider limiting outdoor activity when
moderate to heavy smoke is present. Consider relocating
temporarily if smoke is present indoors and is making you ill. If
visibility is less than 5 miles in smoke in your neighborhood,
smoke has reached levels that are unhealthy.
From: Sep 04, 2025 22:10
Until: Sep 05, 2025 22:00
Red Flag Warning
The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 11 AM to 8 PM MDT Tuesday.
* AFFECTED AREA...Fire Weather Zones 211, 212, 213, 214, 217 and
218.
* TIMING...From 11 AM to 8 PM MDT Tuesday.
* WINDS...West 15 to 20 mph with gusts up to 30-35 mph.
* RELATIVE HUMIDITY...As low as 8 percent.
* IMPACTS...Conditions will be favorable for rapid wildfire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Aug 04, 2025 20:09
Until: Aug 05, 2025 12:00
Flood Watch
* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...Portions of east central and northeast Colorado, including
the following areas, in east central Colorado, North and Northeast
Elbert County Below 6000 Feet/North Lincoln County and Southeast
Elbert County Below 6000 Feet/South Lincoln County. In northeast
Colorado, Elbert/Central and East Douglas Counties Above 6000 Feet.
* WHEN...From 1 PM MDT this afternoon through this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- Strong thunderstorms may produce from 1 to 2 inches of rain
in 30 minutes.
From: Jul 30, 2025 09:20
Until: Jul 31, 2025 03:00
Flood Watch
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Portions of central, east central, and southeast Colorado,
including the following areas, in central Colorado, Canon City
Vicinity/Eastern Fremont County, Northwestern Fremont County Above
8500 Feet, Pikes Peak Above 11000 Feet, Teller County/Rampart
Range Above 7500 Feet/Pikes Peak Between 7500 And 11000 Feet and
Western/Central Fremont County Below 8500 Feet. In east central
Colorado, Colorado Springs Vicinity/Southern El Paso
County/Rampart Range Below 7400 Feet and Northern El Paso
County/Monument Ridge/Rampart Range Below 7500 Feet. In southeast
Colorado, Eastern Las Animas County, Sangre de Cristo Mountains,
Pueblo Vicinity/Pueblo County Below 6300 Feet, Trinidad
Vicinity/Western Las Animas County Below 7500 Feet, Walsenburg
Vicinity/Upper Huerfano River Basin Below 7500 Feet, Wet Mountain
Valley Below 8500 Feet, and the Wet Mountains.
* WHEN...From 1 PM MDT this afternoon through this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- http://www.weather.gov/safety/flood
From: Jul 30, 2025 08:59
Until: Jul 30, 2025 18:00
Air Quality Alert
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Ozone Action Day Alert.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Monday July 14 to 1200 AM Tuesday July 15
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Ozone concentrations in the Unhealthy for
Sensitive Groups category will be possible Monday afternoon and
evening for northern parts of the Front Range region, including
Greeley, Loveland, and Ft. Collins. Improved air quality is
expected Tuesday with ozone concentrations in the Good to Moderate
range. For Colorado air quality conditions, forecasts, and
advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until midnight, Monday
night, July 14, 2025. Colorado is also addressing ozone pollution
through state policies. For more information about health impacts
and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health
HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.
From: Jul 14, 2025 22:10
Until: Jul 15, 2025 06:00
Air Quality Alert
The Colorado Department of Public Health and Environment has
issued the following...
WHAT...Ozone Action Day Alert.
WHERE...Douglas, Jefferson, Denver, western Arapahoe, western
Adams, Broomfield, Boulder, Larimer, and Weld Counties
WHEN...400 PM Friday July 11 to 400 PM Saturday July 12
IMPACTS...Ozone Action Day Alert is now in effect for the Front
Range Urban Corridor. Unsettled weather will keep ozone in the
Good to Moderate range on Friday. However, hot, stagnant weather
on Saturday will allow ozone to reach the Unhealthy for Sensitive
Groups level. For Colorado air quality conditions, forecasts, and
advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx If
possible, please help us reduce ozone pollution by limiting
driving gas and diesel-powered vehicles until at least 4 p.m.
Saturday, July 12, 2025. Colorado is also addressing ozone
pollution through state policies. For more information about
health impacts and how ozone pollution forms in Colorado, visit:
https://cdphe.colorado.gov/ozone- pollution-and-your-health
HEALTH INFORMATION...Increasing likelihood of respiratory symptoms
and breathing discomfort in active children and adults and people
with lung disease, such as asthma. Active children and adults, and
people with lung disease, such as asthma, should reduce prolonged
or heavy outdoor exertion.
From: Jul 11, 2025 22:10
Until: Jul 12, 2025 22:00
Red Flag Warning
The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 11 AM this morning to 9 PM MDT this evening. The Fire
Weather Watch is no longer in effect.
* AFFECTED AREA...Fire Weather Zone 214.
* TIMING...From 11 AM this morning to 9 PM MDT this evening.
* WINDS...West 10 to 20 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...13 to 17 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a
spark and start a wildfire.
From: Jul 10, 2025 07:36
Until: Jul 10, 2025 21:00
